Adrian Peterson Signed Oklahoma Sooners F/S Speed Helmet Beckett 37991 The number in the listing title is just an inventory sku for our records and is not the authentication number. The item pictured is a stock photo unless otherwise noted. This is a Oklahoma Sooners full size speed replica helmet that was personally autographed by Adrian Peterson. Includes a certificate of authenticity from Beckett Authentication Services (BAS) and Denver Autographs.